%I #4 Feb 24 2012 12:50:39
%S 1,4,84,4488,458448,76530048,18958160064,6533187385728,
%T 2990371546714368,1755799654033628160,1286962755283219153920,
%U 1152156355072706267179008,1237421224352190570236497920
%N arcsin(arcsin(tan(x)))=x+4/3!*x^3+84/5!*x^5+4488/7!*x^7+458448/9!*x^9...
%K nonn
%O 0,2
%A Patrick Demichel (patrick.demichel(AT)hp.com)